document.write( "Question 442274: Extremely confused daughter tried to help and she is stumped this is from an algebra practice test word problem is: \r
\n" ); document.write( "\n" ); document.write( "A merchant has coffee worth $10 a pound that she wants to mix with 40 pounds of coffee worth $80 a pound to get a mixture that can be sold at $30 a pound. How many pounds of the $10 coffee should be use. Can you explain and show how you came up with answer please. Thank you for any help you can give us.
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Algebra.Com's Answer #305075 by mananth(16946)\"\" \"About 
You can put this solution on YOUR website!
------ Price ---------------- quantity
\n" ); document.write( "Coffee type I 80 ---------------- 40
\n" ); document.write( "Coffee type II 10 ---------------- x
\n" ); document.write( "Total 30 ---------------- 40 + x
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\n" ); document.write( "80*40+10*x=30(40+x)
\n" ); document.write( "3200+10x=1200+30x
\n" ); document.write( "10x-30x=1200-3200
\n" ); document.write( "-20x=-2000
\n" ); document.write( "/-20 \
\n" ); document.write( "x= 100 pounds 10% Coffee type II
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